For example, the U.S. App Store indexes BOTH English (U.S.) and Spanish (Mexico) localizations. Because of that, users of the U.S. App Store can search for an app using the keywords in both localizations.

So if you publish your mobile app to the U.S. App Store, you can use the 100 keyword character space in BOTH English (U.S.) and Spanish (Mexico) localizations.

A total of 200 character space. A double up!

In the Spanish localization, you can enter Spanish keywords. Or if you prefer, you can also enter English keywords there too.

Got the idea?

App Store Keyword Optimization Tips:

Multiply Your Keywords in All App Store MarketsClick here to get a free list of all countries in the world that you can apply the trick above. The list also shows you what additional localizations you could use in each App Store market to store extra keywords.

Multiply Your App Name
You can apply the same localization tactic to the app name field to include more keywords. As mentioned in our App Store SEO Tips and App Store Optimization Tips, keywords in the app name carry more weight than in the keyword field when it comes to app store search ranking. By using this trick, you will have a big advantage over your competition.

And the good news is:

This App Store keyword optimization technique works not just in the U.S. market. It works in all App Store markets in the world.

This way, you can easily double the space available for your App Store keywords in English or any other language you prefer.

All you need to know are the localization languages that are indexed by your target App Store market.

But you may ask:

“How do I know which localizations are indexed by my target App Store markets?”

This leads to the next section…

Which App Localizations Should I Use?

App Store indexes at least two app localizations in each App Store market.

And some markets have even more!

For instance, Switzerland App Store indexes five localizations: German, French, Italian, English (Australia) and English (U.K.).

That means you can 5x your app store keywords in Switzerland App Store.

Hi,Thanks for the great article!
Do you know about this process in Google play as well?
we noticed that english UK/Australia/Singapore/etc. App Name localisations do have an effect on the US keyword rankings!

I have released a new app version and added some Japanese keywords to English (Australia) on iTunesConnect. I have mixed Japanese and English. All keywords from English (Australia) are ranking in Australia, but don’t in Japan at all. It did not have any effect. There are some long tail keywords with very low competition, but they don’t rank either. Any ideas? Should I try English (U.K.)?

Lets say I have one set of Keywords for English UK and another for English AUS.

Now I am accessing the app store from the UK, If I search for keywords that are indexed in the AUS version will the app show? In other words when I search it checks all the localisations and not just the UK one?